Sanja portable shrines on boats. Sanja means "Three Shrines." The three fishermen who found the Kannon buddha statue (the origin of Sensoji Temple) are deified by Asakusa Shrine next to Sensoji Temple. 三社大権現祭礼 船渡御

This is the first portable shrine. The portable shrines used to be paraded in a boat.
三社大権現祭礼 船渡御